三个红色和两个黑色
5 o# c$ a9 k+ k' @ K' w' v( b: G) R' }
8 z. \( |3 n, @0 a+ E. s) k最后那个说我不知道我戴什么颜色帽子.
5 U1 X! M5 R K0 S7 Q2 |tvb now,tvbnow,bttvb- the front #1 , #2 must not be black/black. Otherwise, #3 will know he is red. #1/#2 must be red/red or red/black or black/red.5.39.217.77& r7 o9 [& m( p( }! G( @4 `
9 M) W' D8 U7 F: t6 i/ K# C; x
中间那个说我也不知道我戴什么颜色帽子.4 H, Y# x) {1 R. `- C
- for #2, if he see #1 wearing black, he can be sure he is red. since #2 cannot be sure, then #1 must NOT be wearing black.
- _4 |: K, o7 o/ \, Qtvb now,tvbnow,bttvb
* l7 z: ^. O: M6 Q6 N但是第一个说我知道我戴什么颜色帽子.
: t9 R! u% h9 t0 `! P5 |9 @- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
| 
